<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片区域-->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
      <!--表格-->
      <tree-table
        class="treetable"
        :data="cateLists"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        :show-index="true"
        index-text="#"
        border
      >
        <!--是否有效-->
        <template slot="isOk" slot-scope="scope">
          <i
            class="el-icon-success"
            style="color:lightgreen"
            v-if="scope.row.cat_deleted === false"
          ></i>
          <i class="el-icon-error" style="color:red" v-else></i>
        </template>
        <!--排序-->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            size="mini"
            type="success"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <!--操作-->
        <template slot="opt" slot-scope="">
          <el-button type="primary" icon="el-icon-edit" size="mini"
            >编辑</el-button
          >
          <el-button type="warning" icon="el-icon-delete" size="mini"
            >删除</el-button
          >
        </template>
      </tree-table>
      <!--分页-->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>
    <!--添加分类的对话框-->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <!--添加分类的表单-->
      <el-form
        :model="addCartForm"
        :rules="addCartFormRules"
        ref="addCartFormRef"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCartForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级别类" label-width="80px">
          <el-cascader
            v-model="selectKeys"
            :options="getParentLists"
            :change-on-select="true"
            clearable
            :props="{
              expandTrigger: 'hover',
              value: 'cat_id',
              label: 'cat_name',
              children: 'children'
            }"
            @change="ParentCateChanged"
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      cateLists: [],
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isOk'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible: false,
      addCartForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addCartFormRules: {
        cat_name: [
          { required: true, message: '请输入活动名称', trigger: 'blur' }
        ]
      },
      getParentLists: [],
      selectKeys: []
    }
  },
  created() {
    this.getCateLists()
  },
  methods: {
    async getCateLists() {
      const { data: res } = await this.$http.get('categories', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败')
      }
      console.log(res.data)
      this.cateLists = res.data.result
      this.total = res.data.total
    },
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateLists()
    },
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateLists()
    },
    addCateDialog() {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 }
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败')
      }
      this.getParentLists = res.data
    },
    ParentCateChanged() {
      console.log(this.selectKeys)
      if (this.selectKeys.length > 0) {
        this.addCartForm.cat_pid = this.selectKeys[this.selectKeys.length - 1]
        this.addCartForm.cat_level = this.selectKeys.length
        return ''
      } else {
        this.addCartForm.cat_pid = 0
        this.addCartForm.cat_level = 0
      }
    },
    addCate() {
      this.$refs.addCartFormRef.validate(async valid => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.post(
          'categories',
          this.addCartForm
        )
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加分类成功')
        this.getCateLists()
        this.addCateDialogVisible = false
      })
    },
    addCateDialogClosed() {
      this.$refs.addCartFormRef.resetFields()
      this.selectKeys = []
      this.addCartForm.cat_level = 0
      this.addCartForm.cat_pid = 0
    }
  }
}
</script>

<style lang="less" scoped>
.treetable {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
}
</style>
